destroy() Destroys the filter and removes it from the filter stack. Source code:

initShaderBuffers() Initialises the shader buffers. Source code:

setContext(gl) Initialises the context and the properties. Parameters

applyFilterPass(filter, filterArea, width, height) Applies the filter to the specified area. Parameters

offsetY : number Source code:

offsetX : number Source code:

begin(renderSession, buffer) Parameters Name Type Description

pushFilter(filterBlock) Applies the filter and adds it to the current filter stack. Parameters

popFilter() Removes the last filter from the filter stack and doesn't return it. Source

filterStack : Array Source code: